Metal covered door



J. F. PEELLE El AL July 8, 1941.

METAL COVERED DOOR Filed Nov. 27, 1940 2 Sheets-Sheet 1 j j JFIMz'J f. PEELLE w! Perm W llvvfrrz/v,

@ME M.

ATTORNEY July 8, 1941.

J. PEELLE ET AL METAL COVERED DOOR 2 Sheet-Sheet 2 Filed Nov. 27, 1940 JAMEJ F PEELLE 4 Pzrzz W. VAA/[TTEM INVENTORS,

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A TTORNEY.

Patented July 8, 1941 METAL COVERED noon James F. Peelle and Peter W. Van Etten, Richmond, Ind.

Application November 2'7, 1940, Serial No. 367,384

Claims.

Our present invention relates to the construction of metal covered doors which are used in locations endangered by fire hazards. We are aware that several types of constructions have been used in the manufacture of metal covered doors, some of which are approved by the Underwriters Laboratories, Inc. for use in locations where extreme hazards exist. It is the intention of our present construction to produce metal covered doors which give the utmost protection when installed in openings which are subjected to extreme exposures from fire hazards, and which will meet the severe tests imposed thereon by the Underwriters Laboratories, Inc.

The principal object of the invention is the provision of a metal covered door which will withstand severe exposure to heat such as would be encountered in a burning structure in which the door might be installed.

Another object of the invention is the provision of a metal covered door in which each face of the door is covered with a single sheet of metal and producing flush surfaces on the finished door.

Another object of the invention is the provision of means for neatly and effectively securing the vertical edges of the metal covering to the core members of the door.

Another object of the invention is the provision of metal strips located within the core for rigidly securing the edges of the metal covering therethrough.

A further object of the invention is the provision of means positioned in the vertical edges of the door for preventing moisture from entering the core portion.

A still further object of the invention is the provision of a metal covered door which is simple of construction and economical to manufacture, and which affords the utmost in fire protection in hazardous locations.

Other objects and advantages of the invention will suggest themselves in the course of the following description, and that which is new will be pointed out in the appended claims.

The most satisfactory means of carrying out the principles of the invention in a practical, comprehensive, and efiicient manner is shown in the accompanying two sheets of drawings, in which- Figure 1 is an elevational detail of a door embodying the principles of the invention.

Figure 2 is a detail section through one vertical edge of the door taken on line Z-2 of Figure 1, the opposite edge of the door being constructed similar to that shown in Figure 2.

Figure 3 is a partial elevation of one of the vertical edges of the door, taken from line 3-3 of Figure 1.

Figure 4 is a detail vertical section through the upper edge of the door, taken on line 4-4 of Figure 1, with the lower edge of the door being of a similar construction.

Figure 5 is a detail plan view taken from line 5--5 of Figure 1 showing the method of securing the upper edges of the metal covering to the core members. The metal is secured in a similar manner to the lower edge of the door.

Figiu'e 6 illustrates the sequence of application of the metal covering members to the core member.

Figure 7 is an elevational detail of a door similar to Figure 1 except that the door is shown as being prepared for the application of hardware thereto.

Figure 8 is a detail elevation taken from line 8-8 of Figure 7 showing the cutout or mortise and the method of reinforcing the core for the application of a lock member.

Figure 9 is a partial detail elevation taken from line 9--9 of Figure 8 showing the lock mortise and reinforcing members.

Figure 10 is a detail section through the lock mortise taken on line Ill-l0 of Figure 8.

Figure 11 is a detail elevation taken from line i il l of Figure '7 showing the cutouts and rein forcing members for the application of hinges to the door.

Figure 12 is a partial elevation taken from line !2l2 of Figure-11.

Figure 13 is a detail section through the hinge cutout taken from line I3l3 of Figure 11.

Like characters designate like parts throughout the several views.

In order that the construction'and the advantages of the invention may be more fully understood and appreciated, we will now take up a detailed description thereof, in which we will set forth the same as fully and as compre-.

hensively as we may.

In the drawings, 1 designates the metal covering on the face or front side of the door. 2 designates a like metal covering applied to the rear side of the door. In forming the metal covering for the core, the vertical edges of the metal sheets are turned at substantially right angles with relation to the major portions of the sheets forming the portions 3 and 4 respectively of the front and rear sheets I and 2. The

inwardly-turned flange portions and 6 are formed on the respective portions 3 and 4 and are adapted to be inserted in the channel member I.

The core portion of the door is formed of a combination of wood, metal, and fire-resistant members. The core is comprised of the members 8, 9, II], II, l2, l3, I4, and I5. The vertically positioned core members 8 are kerfed with rabbets being formed thereby for the reception of the horizontally positioned members 9 which are rigidly secured through the members 3 by means of nails H5 or by other suitable means. The members [0 are positioned vertically and at right angles with relation to the members 9 and are secured therethrough by means of nails ll. A metal member II is positioned ad- J'acent the edge of the member 8 with the member l2 being secured therethrough by means of nails l8. After the core members 8, 9, [6, H, and I2 are assembled, the metal member I3 is positioned across the top of the assembly with the wood member l4 being secured therethrough by means of nails l9. Corresponding members l3, M, and I9 (not shown) are provided on the lower end of the assembled core. After the members have been assembled as above described, a member is applied to one or both faces of the core. The member I5 is preferably sheet asbestos or similar fireproof material, and is secured to the core by means of adhesive substance, or may be loosely laid on the core without the use of an adhesive agent.

After the core is assembled, a channelled groove is formed the full height of each of the core members 12 for the reception of the channel members 1, after which the cover members l and 2 are positioned on the core with the members 5 and 6 extending into the channel members 1.

After the cover members are in place on the core as above described, screw-nails 2| are driven through the members 3 and 4 securing the same through the members II and i2. Screw-nails 22 are driven through the joint formed between the members 5 and 6. The nails 22 extend through the channel member 1 and the core members l2 and II.

The lower edges (not shown) and the upper edges of the metal covering sheets I and 2 are lapped over each other and nailed through the members M and [3 by means of nails 23 and 24, as shown in Figures 4 and 5.

The heads of all nails may be driven slightly below the adjacent surfaces of metal and covered with solder which may be ground smooth and flush with the adjacent surfaces of the metal covering to produce a finished surface. The joints formed between the members 3 and 4 may also be filled with solder and ground smooth to produce a finished surface. The solder however, does not provide structural strength to the assembled door when exposed to extreme heat. Under extreme heat, the solder melts and leaves perceptible openings through which gases generated in the wood core may escape and thereby prevent undue bulging and distortion of the metal covering.

The above-described assembly is satisfactory where surface-applied hardware is used to secure the door in a frame. However, when mortise type hardware is used, it is usually necessary to provide reinforcing members in the construction to which the hardware may be rigidly secured by means of machine screws. The reinforcing members and the application of the same to the core are shown in Figures 7 to 13 inclusive.

When it is known in advance that reinforcing members will be required for the attachment of hardware, it is necessary that the core and the metal covering be arranged therefor prior to complete assembly of the members.

Referring now to Figures 7 to 13 inclusive, the core members have a cutout or mortise 25 formed therein for the reception of a lock member. Rabbets are formed in the edge of the door adjacent the cutout 25 for the reception of upper and lower reinforcing members 23 and 29 respectively to which the lock is removably secured through its face plate by means of machine screws threaded into the apertures 39 and 3!. The reinforcing members 28 and 29 are rigidly secured to the core by means of threaded screws 32. The metal covering adjacent the cutout 25 is secured to the core by means of screwnails 33, as shown in Figures 8, 9, and 10. It will be noted from Figures 8 and 9 that the channels 1 end against the respective reinforcing members 28 and 29. It will be further noted from Figure 10 that the members 5 and 6 are notched where they are adjacent the reinforcing members 28 and 29. Apertures 26 are normally requircd through both faces of the door for knob spindles, and an aperture 2"! is normally required through one side of the door for a lock cylinder.

Each of the hinge reinforcing members 3 1 is formed of a single piece of steel having threaded apertures 35 formed therethrough for the reception of machine screws for the attachment of hinges thereto.

Each of the reinforcing members 34 is rigidly secured to the core by means of threaded screws The members 3 and 4 adjacent the hinge cutouts are secured to the core by means of screw-nails 31. The channel members 1 terminate against the ends of the reinforcing members 34 with the flanges 5 and 6 being notched where they extend over the reinforcing members.

It is well known to the trade that wood core members such as used in metal covered door construction generate considerable gas pressure when the same become charred due to excessive heat caused by fire. The asbestos member [5 provided between the metal covering and the wood core tends to retard the transmission of heat from the exposed metal covering to the wood core and thereby tends to lessen the pos sibility of the formation of gas pressure within the core.

The provision of the metal members I I and 13, located within the wood core, provides means preventing the normal retraction of the screwnails in the event the metal covering is expanded by extreme heat applied thereagainst, whereas common smooth nails driven into wood might readily be retracted in the event that the metal covering should become distorted or expanded due to the presence of an extreme amount of heat such as is caused by fire.

The channel members I prevent permeation and attendant expansion of the wood core under humid climatic conditions, and provides a comparatively tight joint at the meeting of the edges 5 and 6.

It is to be understood that minor changes may be made in the several parts and in the details herein shown and described, insofar as the changes may fall within the scope of the appended claims.

Having now fully shown and described the invention, what we claim, and desire to secure by Letters Patent of the United States, is:

1. In a metal covered door, a core having a channelled groove formed in each vertical edge thereof, a channel member set into each channelled groove, metal sheets having flanges turned into the channel members, and means securing the metal sheets and the channel members to the core.

2. In a metal covered door, a core comprised of a combination of wood and metal members assembled together with the outermost vertical wood members having channelled grooves formed therein, channel members positioned in the channelled grooves, metal cover members having flanges formed on the vertical edges thereof with the flanges extending into the channel members, and means securing the metal cover members to the wood and metal core members.

3. A metal covered door having a core with channelled grooves formed in the vertical edges thereof, metal channels forming linings in the channelled grooves, metal cover sheets extending over the surfaces of the core with their edges forming flanges and extending into the metal channels, and means securing the metal cover sheets to the core.

4. In a metal covered door, a core having metal strips positioned therein, vertical edge members forming parts of the core and having channelled grooves formed therein, metal channel members forming linings for the channelled grooves, metal cover sheets having flanges formed by the vertical edges thereof with the flanges being turned into the metal channel members, and with the metal cover sheets being secured to the core by means of screw-nails extending into the core and through the metal strips thereof.

5. A metal covered door comprising in combination, a wood core having metal strips applied against the edges thereof, vertical wood edge strips and horizontal wood edge strips secured to the wood core through the metal strips, with each of the vertical wood edge strips having a JAMES F. PEELLE. PETER W. VAN ETTEN. 

